Update tar-fs dependency

Checked our usage of this and it is very simple, also did a cursory
check of changes between `tar-fs` versions 1.13.0 and 1.16.3 -- did
not find any changes that appeared to be breaking or that would
otherwise affect our usage of this package.

x-pack/package.json

@@ -261,7 +261,7 @@
     "squel": "^5.12.2",
     "style-it": "2.1.2",
     "styled-components": "3.3.3",
-    "tar-fs": "1.13.0",
+    "tar-fs": "1.16.3",
     "tinycolor2": "1.3.0",
     "tinymath": "1.1.1",
     "topojson-client": "3.0.0",

yarn.lock

@@ -20971,16 +20971,7 @@ tapable@^1.0.0, tapable@^1.1.0:
   resolved "https://registry.yarnpkg.com/tapable/-/tapable-1.1.0.tgz#0d076a172e3d9ba088fd2272b2668fb8d194b78c"
   integrity sha512-IlqtmLVaZA2qab8epUXbVWRn3aB1imbDMJtjB3nu4X0NqPkcY/JH9ZtCBWKHWPxs8Svi9tyo8w2dBoi07qZbBA==
 
-tar-fs@1.13.0:
-  version "1.13.0"
-  resolved "https://registry.yarnpkg.com/tar-fs/-/tar-fs-1.13.0.tgz#4ac62c0de490dbba9e307d0a0312641091d5c45e"
-  integrity sha1-SsYsDeSQ27qeMH0KAxJkEJHVxF4=
-  dependencies:
-    mkdirp "^0.5.0"
-    pump "^1.0.0"
-    tar-stream "^1.1.2"
-
-tar-fs@^1.16.2, tar-fs@^1.16.3:
+tar-fs@1.16.3, tar-fs@^1.16.2, tar-fs@^1.16.3:
   version "1.16.3"
   resolved "https://registry.yarnpkg.com/tar-fs/-/tar-fs-1.16.3.tgz#966a628841da2c4010406a82167cbd5e0c72d509"
   integrity sha512-NvCeXpYx7OsmOh8zIOP/ebG55zZmxLE0etfWRbWok+q2Qo8x/vOR/IJT1taADXPe+jsiu9axDb3X4B+iIgNlKw==